<%@page import="java.sql.*" %>
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
    <title>整表查询数据</title>
     <%! ResultSet rs; //数据库查询结果 %>
     <%
      String dbName = "school";//数据库
         String userName = "root";//账户
         String userPassword= "123456";//密码
         String url = "jdbc:mysql://localhost/"+dbName+"?user="+userName+"&password="+userPassword;
         Class.forName("com.mysql.cj.jdbc.Driver");//5.7以下不加.cj
         Connection conn = DriverManager.getConnection(url);//连接数据库
         Statement statement = conn.createStatement();//创建操作对象
         String sql = "select * from student";//查询学生表所又字段
         rs = statement.executeQuery(sql);//运行sql命令查询数据 结果放到rs结果集中
     %>
</head>
<body>
<form action="first.jsp" method="post">
    <table>
        <th colspan="2">查询条件</th>
        <tr>
            <td>学号:</td>
            <td>
                <input type="text" name="stuid" id="stuid">
            </td>
        </tr>
        <tr aria-rowspan="2">
            <td><input type="submit" value="提交"></td>
        </tr>
    </table>
</form>
<div>
    <a href="orderby.jsp">排序查询</a>
    <a href="add.jsp">添加学生</a>
    <a href="update.jsp">更新学生</a>
    <a href="delete.jsp">删除学生</a>
</div>
<table border="1">
    <th colspan="4" style="font-size: x-large;alignment: center">学生信息表</th>
    <tr style="text-align: center">
        <td>学生</td>
        <td>姓名</td>
        <td>出生日期</td>
        <td>所在班级</td>
    </tr>
<%-- 循环展示数据--%>
<% while (rs.next()){%>
<tr style="text-align: center">
    <td><%=rs.getString(1)%></td>
    <td><%=rs.getString(2)%></td>
    <td><%=rs.getString(3)%></td>
    <td><%=rs.getString(4)%></td>
</tr>
<% } %>
</table>
<%-- 关闭数据库连接--%>

<%
rs.close();
statement.cancel();
conn.close();
%>

</body>
</html>